We mentioned RunKeeper, an iPhone application to track all your runs, back in August last year, but since then the application has grown from strength to strength. So much so in fact, that there is now a Pro version available in the Apple iPhone App Store. But wait, here’s the best part — the application is completely free for 24 hours! Grab it for free while you can.

Fastest 10K: akah27 rounds out the December challenges with a time of 33′52”

Awesome job and congratulations to our two winners! We’ve had a blast hosting these challenges in 2008 and we’re looking forward to even more fun in 2009. Thanks to all of our runners who run with us month after month, and welcome to all of our new challengers.

If you’re not already running with us, head over to the Challenges page, join in, and get running!